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Chao’s lower bound estimator and the size of the Pleiades


In this note we would like to point out that the lower bound estimator of the frequency of hidden units in a target population, developed by Chao in ecology, was developed independently in astro-physics and has been used to estimate the size of flare stars in the Pleiades.

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Correspondence to Dankmar Böhning.

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Handling Editor: Bryan F. J. Manly.

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Böhning, D. Chao’s lower bound estimator and the size of the Pleiades. Environ Ecol Stat 27, 171–173 (2020).

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  • Chao’s lower bound estimator
  • Estimating the number of flare stars
  • Dark number estimation in astro-physics